## Calculus 8th Edition

Given: $-3 rad$=-171.9^{\circ}\$ The standard position of an angle occurs when we place its vertex at the origin of a coordinate system and its initial side on positive x-axis. A positive angle is obtained by rotating the initial side counterclockwise until it coincides with the terminal side. Likewise, negative angles are obtained by clockwise rotation . Since, the given angle is negative therefore, we will move clockwise from the x-axis as depicted in the figure: